<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="state.loginForm" :rules="state.loginRules" class="login-form" auto-complete="on" label-position="left">

      <div class="title-container">
        <h3 class="title">Login Form</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="state.loginForm.username"
          placeholder="Username"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="state.passwordType"
          ref="password"
          v-model="state.loginForm.password"
          :type="state.passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="state.passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button :loading="state.loading" type="primary" style="width:100%;margin-bottom:30px;" @click.prevent="handleLogin">Login</el-button>

      <div class="tips">
        <span style="margin-right:20px;">username: admin</span>
        <span> password: any</span>
      </div>

    </el-form>
  </div>
</template>

<script setup>
import { reactive, watch, getCurrentInstance } from 'vue'
import { useStore } from 'vuex'
import { useRouter, useRoute } from 'vue-router'
import { validUsername } from '@/utils/validate'

const $this = getCurrentInstance()
const router = useRouter()
const route = useRoute()
const store = useStore()

const validateUsername = (rule, value, callback) => {
  if (!validUsername(value)) {
    callback(new Error('Please enter the correct user name'))
  } else {
    callback()
  }
}
const validatePassword = (rule, value, callback) => {
  if (value.length < 6) {
    callback(new Error('The password can not be less than 6 digits'))
  } else {
    callback()
  }
}

const state = reactive({
  loginForm: {
    username: 'admin',
    password: '111111'
  },
  loginRules: {
    username: [{ required: true, trigger: 'blur', validator: validateUsername }],
    password: [{ required: true, trigger: 'blur', validator: validatePassword }]
  },
  loading: false,
  passwordType: 'password',
  redirect: undefined
})

const showPwd = () => {
  if (state.passwordType === 'password') {
    state.passwordType = ''
  } else {
    state.passwordType = 'password'
  }
  $this.$nextTick(() => {
    $this.refs.password.focus()
  })
}

const handleLogin = () => {
  $this.refs.loginForm.validate(valid => {
    if (valid) {
      state.loading = true
      store.dispatch('user/login', state.loginForm).then(() => {
        router.push({ path: state.redirect || '/' })
        state.loading = false
      }).catch(() => {
        state.loading = false
      })
    } else {
      console.log('error submit!!')
      return false
    }
  })
}

watch(() => route, route => {
  state.redirect = route.query && route.query.redirect
}, { immediate: true })
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
